Saw-blade.



R. E. MARTIN,

SAW BLADE.

APPLICATION mum APR. 13.1909.

Patentad Dec" 14;, W99.

A WWNESSFS QUEER/i E. MARTIN, HF NEWARK, lT'ElV' JERSEY SAW-ELADE.

Application filed April 13, ISQQ. Berle Nth. 955E389.

To all whom "it may concern:

Be it known that 1, ROBERT E. MARTIN, a citizen of the United States,resieling et Newark, in the county of Essex and State of New Jersey,have invented certain new and useful Improvements in Saw-Blades; and ldo hereby declare the following t9 be a full, clear, and exactcleseriptien of the in-- veniien, such as will ennl' le {)i-llQTSslriliezl in the art to which it nppertnins to make and use the same,reference being had to the cicemnpanying drawings, and to figures ofreference im'irked there-en, which form a part of this speeifiezziion.

'lhis invention relates to a saw, and is designed to provide tool forcarpenters that. will facilitate the sewing 0i timber whether along thef riiin or cross-cub, and; designed i4} combine 2i eressrnt saw and s.rip saw on the blade.

The in ention is further designed to provide e himie having an inclineder curved set in teeth on the enter ed e of the back so limb fhe devicecan be user to start e cut .011 ii wneilen silirfece Without starting infrom (he ecige, and without necess1teting the (h-iliing of holes or thechiseiing awnye purl of the surface in allow the introduction oi theblade. This is pnrtiew lnrly desirable in cases Where it is necessary tocut away {he flooring 01' a reem or any board m iiixien, when is(lesired i0 replace the llOFJTLiS. v

The teeth en the inclined or curved edge (if the heel; permit lhestarting if (he cut by means (if the saw by giving-,"pihe teeth theusual sewing action, this bein easy, since the curvature or the angle oithe i'eeth on the buck raises the handle ii censiiierable distance fromthe lieor.

. The invention is illns'lrated in the acehnr panying drawing, inwhielr--- I Figure l is n side view of e saw of my improved eonstnet-inn, and Fist is e iieinil showing the manner of using the bladewhen the back of the blade is in he used "501 starting a cut in w'ilzmesurface Fig. 3 is e. sale view of a modified form of saw showing the adstntion of the reversible hzmiile to the blsu e.

The blmle 10 is provided with any usual handle ll which is )refernblhehl a v a hole 12 which passes ll file and ircngh the him through theblade, the handle being sphite womlen surfuee wiihmit the ne receive theblade, as is common in the meme faeture of saws. The handle made so thatit; can be'removednnd replaced in ii reversed position, as will be seenfrom Fig. 3, this reversible feature IlG-ll llQCQSSlllllj being confinedto the form of handle shown in Figs 3, but; the handle shown in F 1 canbe made reversible, and the reversible-handle is the preferred ene. Thelower of ihe blade 15 preferably straight nni is provided Wi h teeth,ilie teeth for 22, portion of the distance as at ,16, being cross-elm,being teeth knew}; as cross-cut teeth or the teeth that are used on avcross-cull saw, and the tceh 3,5 are these 0f arip saw, that is, the sawthat is us i eieng the grain ll; hes been demonstrated by test that asaw eomhinizi 1 these firm of teeth when operated the flfil eitherripping; or cutting sicress the grain, will:

work iaster than a saw having teeth ni ehe one kind along its cuttingedge. else be observed that the start of the cue is easier, ondifferentlcinds elf Wcc i aiul iii ierent cuts in rels-bien t0 thegrain, will: ene kind of tooth, and. in. other cases with err other kindof teeth enci in this tool the kiwi of teeth besi adapted for the Workin henci can be used for starting ehc cut without mutilating the edge ofthe Weeai nnneeessarily in getting the cut Well starte The back edge l-lcf ihe is ineiineri or curved on its outer (Klfl'fi so that it meets thefront edge, and is previiieii with teeth 15 which can be eitherrip-h-reth er arses-mi; feeih, but are preferably cross-cut. This inelineii or curved cuter end of the bnek edge forms a means, not, presentin hhmhsnwsns iii; present constrncteil, fer culling inure plane her ingheirs to give {1, chance to insert the sewbim'le. er withent chiselingan cpening; he permit the inseriirm the hlerie of {he sew. This is shownin Fig; 2 we in e case where :1 cm? is ('0 be'cntswzlfv, the teeth l5with their curved shape, 'fc im a reeily means fer racking the blademaid in, the same time ing it a reciprocating metion sethat it seen cutsthrough the finer, ami after this pene;

trziiion is accomplished the saw can he re versed, inserted in the cut,anti ilie chi: then preceeded wiih HS with an eriiinery lnmilsew. Neprevicns construction (2-; lmmisews has per-miffed this use of beingopenfll'fiii G7". n plane surface and peneireiing;

it 'Wiii thx qn gh a small portion thereof to penmit the insertion ofthe blade so that the strelght edge of the sew can be used.

Having thus I. claim is:-

l. A sew comprising a blade having a main cutting ed e straight for itsentire length and provi ed with teeth,'the back of the blade bein devoidof teeth for a major portion of its ingth, and being curved andErovided'vvith teeth on its outer end wherey a. curved s'ewin surface isprovided on the enter edge of t e beck. f 2. A blade for sews hex 121%15 a main cutting edge straight for its entire ength and prodeseribed myinvention, what memo vided with teeth, the back edge of the blede beingstraight and devoid of teethfor a major portion of its len h andslightly ta-' ered or inclined tower the front edge, the eck edge at itsend being'ciirved to meet at a point with the main cutting edge wherebyApril, 1909.

RQBERT E. MARTIN.

Witnesses! WM. H. CA MELD,

E. A. Penn.

